Cultivator.



H. PETERSEN.

CULTIVATOR.

APPLICATION FILED FEB.24,1913.

1,084,291 Patented Jan. 13, 1914.

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WITNESSES INVENTUH Henry Peiersenif fill/v ga ga I A T 'TORNEY COLUMBIA PLANoulzAPH (10., wA smNu'roN, n, c.

H. PETERSEN.

UULTIVATOR.

APPLICATION FILED 1113.24, 1913.

1,084,291, v Patented Jan. 13, 1914.

4 SHEETS-SHEET 2.

WI T/VESSES w -am .4 TTOHIIEY H. PETERSEN.

GULTIVATOR.

APPLICATION FILED FEB. 24,1913. 1,084,291. Patented Jan. 13, 1914.

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4 TTORNEY COL UMBIA PLANOGRAPH CO.,\VASHINCITON D c H. PETERSEN.

GULTIVATOR.

APPLICATION FILED FEB.24,1913 I 1,084,29 1 Patented Jan. 13, 1914.

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WITNESSES I INVENTOR Hen r'y Pete rsen.

ATTORNEY COLUMBIA PLANOGRAPH CO.,W;\SHINGTQN. D. c.

WITEE STATEbl j PATENT OFFICE.

HENRY PETERSEN, OF MOUNT AUBURN, IOWA.

CULTIVATOR.

inseam.

To all whom it may concern:

Be it known that I, HENRY PETERSEN, a citizen of the United States of America, and resident of Mount Auburn, in the county of Benton and State of Iowa, have invented certain new and useful Improvements in Cultivators, of which the following is a specification.

This invention relates to cultivators and is designed more particularly as an improve ment upon the construction shown in my Patent No. 1,051,258, granted to me January 21, 1913.

The present invention has for its objects among others to simplify and cheapen the construction, lessening the weight and the material employed in its manufacture, to increase the leverage, to simplify the adjustment of the mast, to avoid strain, insure ease of operation and saving of time, as well as rendering it more convenient in use. In the prior construction the strain on the short lever was such as to generally require two hands at times when the mast was in certain positions in order to control such mast, one hand at the mast and the other at the lever. The present construction aims to overcome this strain and permit of adjustment with greater advantage to the operator with less exertion and in less time, the adjustment being capable of being carried on or made while the cultivator is in operation moving through the field whenever it may be desired to adjust the depth of the earth-engaging members. In the prior construction the parts were so disposed as to at times interfere with the operator and the lines. In the present construction these parts are entirely out of the way, the space between the masts being entirely free from obstruction, thus preventing entanglement of the lines or injury to the hands of the operator or liability of contact by the whip. In the present construction the heel is so disposed as to avoid all tendency to weaken, and all tendency of the mast to lose its position is avoided. The mast has pivotally connected therewith a toothed me-nt which carries the heel. The mast-stopping heel is tensionally connected with the toothed segment. The segment and the heel are mounted for independent pivotal movement upon the same center. The mast and segment are both pivotally mounted at a point above the pivot of the axle. The mast serves, in addition to its general function of Specification of Letters Patent.

Application filed February 24, 1913.

Patented Jan. 13, 1914-.

Serial No. 750,214.

a mast, as a lever, carrying the mast stop, that is, the stop, the segment and the segment-actuating spring are all movable with the mast, yet the segment and spring and stop are mounted at a point in proximity to the lower end of the mast for movement independently of the mast. The mast has mounted thereon a grip trip and pawl for engagement with the toothed segment for adjusting the mast and controlling the depth of the gang of earth-engaging members. In order to get the line of draft as low down as possible, I mount the rock shafts, which in my prior construction were disposed above the frame, at a point below the frame, suspending the same from the frame near the forward end.

Other objects and advantages of the invention will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims. It is to be understood, however, that while the construction herein disclosed and now to be described is what I at the present time consider the preferable form of embodiment of my invention, the same is subject to changes, variations and modifications in details, proportions of parts, etc., without departing from the spirit of the invention or sacrificing any of its advantages. I, therefore, do not wish to be restricted to the exact construction herein set forth, but reserve the right to make such changes, variations and modifications as come properly within the scope of the protection prayed.

The invention in its preferred form is clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a part of this specification, and in which Figure 1 is a side elevation of a cultivator embodying my present improvements. Fig. 2 is a side elevation of the mast and its accessories. Fig. 3 is a front elevation of the parts shown in Fig. 2. Fig. 4 is a side elevation of a slightly modified form of mast with a part broken away and parts in section. Fig. 5 is a rear view of Fig. 4:. Fig. 6 is a detail in side elevation showing still another form of mast. Fig. 7 is a front View of the parts shown in Fig. 6. Fig. 8 is a longitudinal section on the line 88 of Fig. 7. Fig. 9 is a detail similar to Fig. 8 showing a slightly modified form. Fig. 10 is a view similar to Fig. 1 showing the gang frame in elevated position, showing also the position of the other parts when the gang frame is thus elevated. Fig. 11 is a detail in elevation showing a modified form of connection between the lifting arm and the stay rod. 7

Like numerals of reference indicate like parts throughout the several views.

Referring to the drawings, 1 designates the main frame of a cultivator of the sulky type provided with bearings 2 in which is journaled an arched axle 3 of known construction. In Fig. 1 this axle is shown in section and the wheel facing the observer is removed for the sake of clearness and facility in better showing the other parts of the machine. The ground wheels 4 are mounted on the ends of the depending or crank portions 5 of the axle in the usual way.

6 is a seat for the driver supported in any well known manner from the rear of the frame as by bars or the like 7 depending from said frame.

8 is a tongue and 9 a gang frame, particular description of which is unnecessary.

The earth-engaging members 10 may be of any well-known or approved form and character and carried by the frame 9 in any suitable way.

It being understood that the parts now to be described are duplicated upon opposite sides of the machine with the exception of the actuating lever and its connection with the front arms which are connected with the rock shaft, these parts being preferably at the right hand side of the machine, a brief description of those upon one side will necessarily serve for both.

11 are beams extending upwardly and forwardly from the front end of the gang frame, being, by preference, of substantially the form shown in Fig. 1, so as to provide better space for the swingletrees or equalizers, these beams being at their front ends provided with upward extensions 12 which are connected with the ends of the transverse crank shaft or turn bar 13, which latter is mounted to turn in hangers 1 L mounted upon the forward end of the main frame 1 and having eyes 15 in which the cross portion of the crank shaft is mounted. These hangers extend forwardly and downwardly, as seen in Fig. 1, so that the crank shaft is, in effect, suspended from and beneath the main frame 1.

16 are arms secured to the depending portions of the crank shaft in any suitable way, as, for instance, by staples or the like 17, as seen in Fig. 1.

18 are brace or stay rods which connect the arched axle 3 with the arms 16. Around these stay rods are springs 19 connected at their forward ends to the stay rods and at their rear ends connected in any suitable manner, as by the hooks 20, on rigid arms 21 depending from the main frame 1 in advance of the axle, all as clearly illustrated in Fig. 1. These springs serve an important function. They serve in raising the gang frame and when the gang frame is lowered they serve as a cushion; in fact, they serve to equalize the force in both raising and lowering.

Depending from the main frame 1 at each side is a bracket 22 provided with a plurality of apertures 23 for cooperation with a plurality of apertures 24 in the lifting arm 25 into alining apertures 23 and 24 in which a bolt or the like 26 is passed, serving as the fulcrum on which the lifting arm moves. In the present instance the arm 25 is shown as arranged to act upon the mast from the rear. In some instances it may be found expedient to reverse the same so as to act upon the front. The upper end of the arm 25 is in the path of and designed to engage the mast, soon to be described, and in said upper end there may be mounted an antifriction roller or the like 27, as seen in Fig. 1, for an obvious purpose. These arms 25 are outside of the path of the pendulum bars soon to be described, so as not to afford any obstruction therebetween when the actuating lever is down and it is desired to raise said pendulum bars and, consequently, the gang frame. The lower end of the lifting arm 25 has a forked engagement with the arched axle 3. The adjustment provided by the perforations 23 and 24 and the removable pivot 26 permit of the change of stroke or length of movement of the arm 25 whenever occasion requires.

28 are masts pivoted at their lower ends, as at 29, to some fixed support on the frame 1 at a point above the axle 3, as seen in Fig. 1. The mast and the parts closely associated therewith will be described later on.

80 are pendulum bars connected to the gang frame 9 by means which allows of limited movement of the pendulum bar both longitudinally and transversely of the frame. As this means forms no part of the present invention, specific illustration and description thereof is unnecessary. Such connection is shown at 31 in Fig. 1. At its upper end there is adjustably sleeved upon this pendulum bar a clamp or casting 32 provided with clamping bolt 33 whereby it may be adjusted lengthwise of the pendulum bar, said member 32 having an eye 34 adapted to engage a hooked member on the upper end of the mast.

36 is the actuating lever. It is, in the present instance, shown as substantially of right angular form, being pivoted at its forward end, as at 37, to the lower end of the curved arm or member 38 secured at its forward portion to the frame 1, as at 39, and its rear end secured to the frame in this instance by the bolt 40 which serves to hold the depending arm 21 rigidly in position. This member 38 has a plurality of notches 41 and 42 located in substantially the position in which they are shown in Fig. 1, for a purpose soon to be described. The lever 36 has the portion 43 extended beyond its pivot and downwardly and adjustably connected, as at H, with the rear end of the connecting rod 45, the other end of which is connected, as at 46, with the lower end of the depending. bracket 16.

47 is a pawl, of which 48 is the spring, the actuating arm 49 of which pawl is connected, as at 50, with one end of a bell crank lever 51, to the other end of which is connected, as at 52, the rod 53, connected with the pawl-operating lever 54 suitably mounted dupon the actuating lever 36 near its free en 55 are coiled springs connected at their forward ends in any suitable manner with the main frame 1 and at their rear ends with the masts. For this purpose the masts are provided with the lateral lugs or the like 56, as seen best in Figs. 3 and 5. These springs are under tension with a tendency to draw the upper free ends of the masts forward or toward the front end of the machine. They are connected with the masts at a point above the pivots upon which said masts move.

The masts employed may assume a variety of forms, yet all perform substantially the same function. For instance, in Fig. 2 the mast 28 is shown as of channel iron with the hook 35 at the top. As seen in Fig. 3, this mast is provided at a point below its center with an offset 57 which is disposed in the path of the lifting arm 25, so as to be en gaged thereby and out of the path of the pendulum bar. This offset serves a further function in that it provides an enlarged space 58 in which to locate the spring seen in Fig. 3 and soon to be described. The mast is pivotally mounted at its lower end, as previously described, upon the pivot 29 which is mounted in the ears 59 rising from the plate 60 secured to the main frame 1 in any suitable manner, asby bolts 61, as shown in Figs. 1 and 3.

62 is a toothed segment disposed within the space 63 between the side portions of the lower end of the mast, the lower end of the body portion 64; of this segment being bifurcated, as seen in Fig. 3, and the extren'lities 65 thereof mounted for pivotal movement upon a fixed pivot located above the pivot of the axle. In the present instance I have shown the mast and the lower extremities of the body portion of the segment as mounted upon the same pivot 29. It is evident, however, that the mast may be mounted upon pivots independent of such pivot of the segment without aflecting the operation or the result attained.

66 is a spring coiled about a lug or the like 67 extending inward from the offset side portion of the mast, as seen in Fig. 3, said lug being located in the aforementioned space 58, one arm 68 of this spring bearing against the side portion of the mast and the lower end bearing against the front side of one of the bifurcations of the lower portion of the member 64 of the segment, as seen at 69, to separate the segment from the mast.

70 is a bifurcated plate mounted for pivotal movement upon the same pivot as the toothed segment but for movement independent of said segment, the lower end of said plate terminating in portions 71 which if extended rearward form a heel or stop to limit the movement of the mast, and if extended forward in the form of a toe serve the same function, in which latter case they would contact with some abutment on the main frame to limit their movement.

72 is a bolt held at one end in the body portion 64 of the toothed segment and extending through the body portion of the member 70. 7 3 is a spring around this bolt bearing at one end against the body portion 70 and at its other end against a nut or other means 74 on the end of the bolt by which the tension of the spring 73 may be adjusted as occasion may require.

Slidably mounted within suitable guiding members 75 within the channel of the mast upon one side is a plunger pawl 76, of which 77 is the spring which tends to normally keep the pawl in its lowermost position. 78 is a rod pivotally connected, as at 79, with said pawl at its upper end pivotally connected, as at 80, with the lever 81, by means of which the pawl is actuated against the tension of its spring 77, the said lever being pivotally mounted, as at 82, upon a lug or projection 83 on the mast.

In Figs. t and 5 I show a modified form of mast. The mounting of the mast, as well as the mounting of the toothed segment and heel, are the same, the difference being in the formation of the body portion of the mast which, in this instance, instead of being of channel iron as heretofore, is formed of two strips 84, between which the toothed segment operates, the strips being connected together by suitable means, as bolts 85, the upper bolt 85 holding in position between the upper ends of the strips a casting 86 having the hook member 87 for connection of the upper end of the pendulum rod. The pawl-actuating lever 88 is pivotally mounted, as at 89, upon a lug or projection 90 near the upper end of the mast, and pivotally connected, as at 91, to the other arm of the lever is a rod 92 which, in turn, is pivotally connected, as at 93, with the upper end of the plunger pawl 9 designed for cooperation with the toothed segment. A spring 95 within a suitable housing or casing 96 between the side members of the mast acts against a shoulder or the like 97 v on the plunger to normally keep the same in its lowermost position. The operation of these parts is the same as the form shown in Figs. 2 and 3 except in the latter form the lower end of the plunger pawl is extended laterally, as seen at 76* in Fig. 3, to engage in the notches of the segment, said lateral portion extending through openings in the opposite sides of the body portion of the mast.

In Figs. 6 and 7 I have shown a further modification of the mast. In this form the toothed segment, which is pivotally mounted, as at 98, in the ears 59, has the toothed portion composed of two parallel members 99, in the upper face of which the notches are formed, and between these parallel portions the mast 100, which, in this instance, is undivided, is mounted to move, being bifurcated at its lower end, as seen at 101, and the ends mounted upon a suitable pivot 102 held in the cars 59, the body of the toothed segment being bifurcated at its lower end, as at 103, and mounted upon the pivot 102, the bifurcations of the body of the gear being outside those of the mast. A pawl 104 is mounted to slide upon the mast above the toothed segment, the same carrying a tooth 105 adapted to engage in the notches of the segment, a spring 106 around the mast and disposed between an abutment 107 and the body of the pawl serving to normally keep the pawl point 105 in engagement with one of the notches of the segment, it being un derstood that there is a tooth 105 upon each side of the mast, whereby there is double engagement with the toothed segment. The pawl body 104 has a lug or the like 108 for the attachment of a rod for actuating the pawl, it being understood that the pawl may be operated by a lever, such as shown in Figs. 2 and 4c. In this form the toe or heel 109 designed for operation the same as in the other forms, is composed of a stout wire coiled about the pivot 102, the free ends extended to form the toe or heel and the bight of the wire held upon a bolt or the like 110 held in the body portion of the segment 99, as seen clearly in Figs. 7 and 9.

In some instances I may lengthen the bolt 110, as seen in Fig. 8, and place about said bolt a spring 111, as seen in said view, adapted to tension the heel. This spring, however, may be omitted in cases where sufficient tension is given without the employment of such additional spring.

It is to be noted that the lever by which the pawl which cooperates with the notched segment is operated is arranged with its pivot uppermost, whereby the lever is in the most convenient position to be grasped and actuated by the hand of the operator and yet his hand is still controlling the mast.

With the parts constructed and arranged substantially as hereinbefore described, the operation will be apparent and a further detailed description thereof does not seem necessary. It seems sufficient to state that with the parts shown in the position in which they are illustrated in Fig. 1, the gang frame is in its lowermost position and the earth-engaging members are at their lowermost limit. If it be desired to adjust the depth of the cut of the earth-engaging elements, all it is necessary to do is to press upon the pawl-operating lever, such as 82, releasing the pawl from engagement with the toothed segment, when the mast may be moved forward or backward covering a space of one or more notches in the segment, and the earth-engaging members correspondingly raised or lowered. As soon as pressure is removed from the pawl-operating lever, the pawl is forced into engagement with its notch and the gang frame held in its adjusted position. The tension spring acting on the heel plate permits of limited automatic yield should the earth-engaging members meet with an obstruction on the points thereof, the parts being antomatically returned to normal position after such obstacle has been removed, thus avoiding liability of breakage of any of the parts. When it is desired to raise the gang frame so that the earth-engaging members 7 are elevated entirely clear of the ground, for

instance, as for transportation or moving from one place to another or turning around at the ends of the field or row, the handle portion of the actuating lever 36 is grasped by the operator and moved upward, first disengaging the pawl 17 from its notch 4:2 in the member 38, and as the handle end of the lever is moved upward, the connecting rod 45 moves the rock shaft or turn bar 13 rearward and upward and by reason of the connection of the rock shaft or turn bar with the beams 11, the forward end of the gang frame is elevated. At the same time the stay rods 18 force the axle rearward, the elevating bars 25 contact with the masts and the masts are moved forward, elevating the pendulum rods and, consequently, elevating the rear end of the gang frame. Thus the front and rear ends of the gang frame are raised simultaneously and in a plane parallel with the main frame. Fig. 10 indicates clearly the position of the parts when the gang frame is elevated, it being noted that when the gang frame is in its elevated position, the locking pawl 17 is in engagement with the notch 41 of the member 38 and the masts are firmly held in their forwardly inclined position by the lifting arms. By reason of the lifting bars being out of the plane of the pendulum bars, the latter may be raised either together or one independently of the other, by hand, without using the main actuating lever.

In Fig. 11 I have shown a construction by which I am enabled to adjust the axle to accommodate a driver of greater or less weight without altering the position of the lifting arm. As seen in Fig. 1, the stay rod 18 is adjustably connected with the axle by a telescopic connection, seen at 18. In the form shown one portion is provided with a plurality of openings through which bolts can be changeably placed to accomplish the lengthwise adjustment. In this form, that is as shown in Fig. 1, when the stay rod is adjusted to lengthen the distance between its forward end and its connection with the axle so as to throw the axle rearward to compensate for the weight of a heavy driver or when it is adjusted in the opposite direction to accommodate a driver of less weight, the lifting arm 25 is correspondingly moved upon its pivot 26 out of position relatively to the mast. The construction shown in Fig. 11 is to overcome this necessary movement of the lifting arm and to permit of the adjustment of the axle rearward or forward without changing the position of the lifting arm relatively to the mast. For this purpose the lower end of the lifting arm 25, instead of having forked engagement with the axle, as in Fig. 1, has pivotally connected with its lower end, as at 112, a rod or arm 113, the other end of which is pivotally connected, as at 11 1, with the stay rod 18. By this means, it will be seen that when the stay rod 18 is adjusted to increase or decrease the distance between the axle and the forward end of said rod, the position of the lifting arm is not changed, because the rod 113 is connected with the relatively fixed member 18, the other portion 18 being the one that is movable with the axle. Consequently, movement of the axle forward or backward in no wise affects the position of the lifting arm 25.

What is claimed as new is 1. In a cultivator, the combination with an arched axle, a gang frame, and a mast pivoted above the pivot of the axle, of a toothed segment and a tensioned mast stop mounted on the pivot of the segment and movable with said segment.

2. In a cultivator, the combination with an arched axle, a gang frame, and a mast pivoted above the pivot of the axle, of a toothed segment, and a tensioned mast stop mounted upon the pivot of the segment and movable with the segment and independent of the mast.

3. In a cultivator, the combination with a frame, an arched axle, a gang frame and a mast pivoted above the pivot of the axle, of a pivoted toothed segment movable with or independent of the mast, and a mast stop pivoted above the pivot of the axle and movable with or independent of the mast.

4. In a cultivator, the combination with a frame, an arched axle, a gang frame and a mast pivoted above the pivot of the axle, of a pivoted toothed segment movable with or independent of the mast, and a mast stop pivoted above the pivot of the axle and movable with or independent of the mast, said stop being tensionally connected with the segment.

5. In a cultivator, the combination with a frame, an arched axle, a gang frame and a mast pivoted above the pivot of the axle, of a pivoted toothed segment movable with or independent of the mast, and a mast stop pivoted above the pivot of the axle and movable with or independent of the mast, said stop being tensionally connected with the segment, and a plunger pawl on the mast engageable with said segment.

6. In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally mounted at a point above the pivot of the axle, a pendulum bar connecting the mast and gang frame and a lifting bar normally out of engagement with but engageable with the mast and out of the plane of the pendulum bar.

7. In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally mounted at a point above the pivot of the axle, a pendulum bar connecting the mast and gang frame, a lifting bar engageable with the mast and out of the plane of the pendulum bar, and a mast stop movable with or independent of the mast.

8. In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally mounted at a point above the pivot of the axle, a pendulum bar connecting the mast and gang frame, a lifting bar engageable with the mast and out of the plane of the pendulum bar, a pivoted geared segment movable with or independent of the mast and a mast stop tensionally connected with said segment.

9. In a cultivator, an arched axle, a gang frame, a mast pivoted above the pivot of the axle, a pendulum bar connecting the axle and gang frame, means actuated by and movable relative to the arched axle for engaging said mast, said means being out of the plane of the pendulum bar, and a mast stop movable with or independent of the mast.

10. In a cultivator, an arched axle, a gang frame, a mast pivoted above the pivot of the axle, a pendulum bar connecting the axle and gang frame, means actuated by and movable relative to the arched axle for engaging said mast, said means being out of the plane of the pendulum bar, a mast stop movable with or independent of the mast, and a toothed segment pivoted above the pivot of the axle and movable with said mast stop.

11. In a cultivator, an arched axle, a ang frame, a mast pivoted above the pivot of the axle, a pendulum bar connecting the mast and gang frame, means actuated by and movable relative to the arched axle for engaging said mast, said means being out of the plane of the pendulum bar, a mast stop movable with or independent of the mast, and a toothed segment pivoted above the pivot of the axle and movable with said mast stop, the maststop being tensionally connected with said toothed segment.

frame, a mast pivoted above the pivot of the axle, a toothed segment pivotally mounted above the pivot of the axle, a mast stop mounted on the pivot of said segment and means cooperating with said segment for adjusting the mast and controlling the depth of the gang of earth-engaging members.

13. In a cultivator, an arched axle, a gang frame, a mast pivoted above the pivot of the axle, a pivoted toothed segment, a mast stop mounted for independent pivotal movement upon the same center as the segment, and means on the mast for engaging the segment for adjusting said mast and controlling the depth of the gang of earth-engaging members.

14. In a cultivator, an arched axle, a gang frame, a mast pivoted above the pivot of the axle, a pivoted toothed segment, a mast stop mounted for independent pivotal movement upon the same center as the segment, means on the mast for engaging the segment for adjusting said mast and controlling the depth of the gang of earth-engaging members, and means for adjusting the gang frame upwardly or downwardly.

15. In a cultivator, a 'main frame, an arched axle, a gang frame, a mast pivotally mounted above the pivot of the axle, a toothed segment pivotally mounted above the pivot of the axle, amast stop movable with the segment independent of the mast, a pivotal connection bet-ween the mast and gang frame, a lifting bar adapted to engage the mast and arranged out of the pat-h of said connecting means and a tension spring acting on the toothed segment.

16. In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally mounted above the pivot of the axle, a toothed segment pivotally mounted above the pivot of the axle, a mast stop movable with the segment independent of the mast, a pivotal connection between the mast and gang frame, a lifting bar adapted to engage the mast and arranged out of the path of said connecting means, a tension spring acting on the toothed segment, and means carried by'the mast for cooperation with the segment.

17 In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally tions between said mast and gang frame, J means for ad usting the axle rearwardly or ing on the geared segment, means carried by the mast for cooperation with the segment,

and means for raising and lowering the gang frame parallel with the main frame. 12. In a cultivator, an arched axle, a gang 18. In a cultivator, a main fr, me, a gang frame, a pivotally mounted mast, connecforwardly, a lifting arm disconnected from and adapted for cooperation with the mast, and means whereby the position of the axle may be adjusted without affecting the po sition of the lifting arm.

19. In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally mounted on the main frame, a pendulum bar connecting the mast and gang frame,a pivotally mounted lifting arm normally out of engagement with and arranged in the path of the mast, means for shifting the axle forwardly or rearwardly according to the weight of the driver, and means whereby 5 adjustment of the axle does not alter the position of the lifting arm.

20. In a cultivator, a main frame, a gang frame, an arched axle, a mast pivotally mounted above the pivot of the axle, con- 10o nections between the mast and gang frame, means for adjusting the forward end of the gang frame, a pivotally mounted arm normally out of engagement with and arranged for cooperation with the mast and an adjustable stay rod having provision for adjustment of the axle without afiecting the position of the lifting arm.

21. In a cultivator, a main frame, a mast pivotally mounted above the pivot of the axle, and a mast stop mounted upon the pivot of the mast and having a coil and inherently tensioned.

22. In a cultivator, a main frame, an arched axle, a mast pivoted above the pivot of the axle, and a spring mast stop having portions coiled about the pivot of the mast.

23. In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally mounted on the main frame, a pendulum bar connecting the mast and gang frame, a rock shaft suspended beneath the main frame, connections between the gang frame and the cranks of said rock shaft, and connections between said rock shaft and the axle.

24. In a cultivator, a main frame, an arched axle, a gang frame, a mast pivotally mounted on the main frame, a pendulum bar connecting the mast and gang frame, a rock shaft suspended beneath the main frame, 130

connections between said rock shaft and the axle, a lifting arm acting on the mast, and means for adjustment of said connections Without moving the lifting arm.

25. In a cultivator, a mast, a toothed segment capable of connection with the mast to move therewith or disconnection therefrom for independent movement, and a mast stop tensioned on said segment.

26. In a cultivator, a mast, a toothed segment capable of connection with the mast to move therewith or disconnection therefrom for independent movement, and a mast stop tensioned on said segment and movable therewith or independent thereof.

27. In a cultivator, a mast, a toothed segment capable of connection with the mast to move therewith or disconnection therefrom for independent movement, a mast stop tensioned on the segment, and a spring on the mast acting on said segment.

28. In a cultivator, a mast having an offset portion, a segment capable of connection with the mast to move therewith or disconnection therefrom for independent movement, a mast stop tensioned on the segment, and a spring secured within the offset of the mast and acting on the segment.

Signed by me at Washington, D. C., this 21st day of February, 1913.

HENRY PETERSEN.

Witnesses:

E. H. BOND, CHARLES LOWELL HOWARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

